//package com.itheima.controller.backend.security;
//
//import com.itheima.pojo.Permission;
//import com.itheima.pojo.Role;
//import com.itheima.pojo.User;
//import com.itheima.service.UserService;
//import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.security.core.GrantedAuthority;
//import org.springframework.security.core.authority.SimpleGrantedAuthority;
//import org.springframework.security.core.userdetails.UserDetails;
//import org.springframework.security.core.userdetails.UserDetailsService;
//import org.springframework.security.core.userdetails.UsernameNotFoundException;
//import org.springframework.stereotype.Service;
//
//import java.util.ArrayList;
//import java.util.List;
//import java.util.Set;
//
//@Service
//public class SpringSecurityUserServiceImpl implements UserDetailsService {
//    //查找服务，实现查询数据库
//    @Autowired
//    private UserService userService;
//
//    //根据用户名查询数据库中用户信息
//    @Override
//    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
//
//        return null;
//    }
//}